Altering terrain in game using C#

Unity Engine
1

I am trying to create a basic C# script that allows me to alter a particular spot of terrain in game.

This is what I’ve come up with so far,

using UnityEngine;
using System.Collections;

public class ChangeTerrainHeight : MonoBehaviour {

public Terrain TerrainMain;

void OnGui()
{

if(GUI.Button(new Rect(20, 40, 200, 30), “Change Terrain Height”))
{

//get the terrain heightmap width and height.
int xRes = TerrainMain.terrainData.heightmapWidth;
int yRes = TerrainMain.terrainData.heightmapHeight;

//GetHeights - gets the heightmap points of the terran. Store those values in a float array.
float [,] heights = TerrainMain.terrainData.GetHeights(0, 0, xRes, yRes);

//Manipulate the height data
heights[10, 10] = 1f; //0 - 1. 1 being the maximum possible height

//SetHeights to change the terrain height.
TerrainMain.terrainData.SetHeights (0, 0, heights);

}

}

}

//This script is put on my terrain which is named TerrainMain

All it is supposed to do is create a button and when I click on that button it is supposed to change the height of the terrain at 10, 10 to its limit. I am not even getting a button when I play.

Thanks for any/all help

2

OnGui() should be OnGUI()

3

please use [code ][/code ] tags when you paste code into the forums, really helps with the readability, there is a sticky on them at the top of the scripting forum